
13-2 Programming the Sensor Remote Operation
13-2 PN: 10585-00020 Rev. C PowerXpert UG
Time Resolution
The maximum time resolution of the sensor is 10 µs, hence all of the time arguments have a 10 µs resolution.
This does not apply to the MA24105A sensor.
Sampling Rate
The MA24108A, MA24118A, and MA24126A sensors have two sampling rates. For “Continuous Mode” and
Internal “Trigger Source”, the sensor has a sampling time of 6.8288 µs or a sampling frequency of 146.438 kHz.
External “Trigger Source” has a sampling time of 7.3347 µs, or a sampling frequency of 136.338 kHz.
Error Responses
Any unrecognized command is rejected by the sensor with a BAD CMD message. A valid command coupled with
an invalid command is rejected by the sensor with an ERR message. A command failure is also indicated by the
sensor with an ERR message.
Default Sensor Settings
The sensor settings in Table 13-1 apply to the MA24105A.
The sensor settings in Table 13-2, Table 13-3 and Table 13-4 apply to the MA24108A, MA24118A, MA24126A.
Table 13-1. General Default Sensor Settings, MA24105A
Setting Command Default Value
Mode of Operation FORWARD
REVERSE
Continuous Forward Mode
Continuous Reverse Mode
Measurement Frequency FREQ 0.35 GHz
Number of Averages AVGCNT 1
Range SETRNG Auto range (0)
Table 13-2. General Default Sensor Settings, MA24108A, MA24118A, MA24126A
Setting Command Default Value
Mode of Operation CHMOD “Continuous Average Mode (CA Mode)”
(0)
Measurement Frequency FREQ 0.010 GHz
Averaging Algorithm AVGTYP Moving (0)
Number of Averages AVGCNT 1
Auto Averaging AUTOAVG Off (0)
Auto Averaging Source AUTOAVGSRC 1
Auto Average Resolution AUTOAVGRES 0.01 (2)
Range SETRNG Auto range (0)
Table 13-3. Continuous Average Mode Default Sensor Settings, MA24108A, MA24118A, MA24126A
Setting Command Default Value
Aperture Time CHAPERT 20 ms
Duty Cycle Correction CWDUTY 100 %
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